Attachment for paper-feeding machines.



A. P. GREENE.

ATTACHMENT FOR PAPER FEEDING MACHINES.

APPLICATION FILED APR-7,1917.

Patented (Tan. 15, 1918.

WITNESSES Y b A ITO/WE ALVIN P. GREENE, OF WATERTOWN, NEYV YORK.

ATTACHMENT FOR PAPER-FEEDING MACHINES.

Specification of Letters Patent.

Patented Jan. 115, 1918..

Application filed April 7, 1917. Serial No. 160,449.

To all whom it may concern Be it known that I, ALVIN P. GREENE, a. citizen of the United States, and a resident of lVatertown, in the county of Jefferson and State of New York, have invented a new and Improved Attachment for Paper- Feeding Machines, of which the following is a full, clear, and exact description.

My invention relates to machines for antomatically feeding a single sheet of paper, card, or thelike, to printing presses or bag machines, and more particularly the invention is intended for use in connection with a machine for feeding flattenedbag tubes to bag machines.

The present invention resides in novel means for preventing more than onesheet or tube being fed by the feed means. An example of the use of the present invention is given in United States Letters Patent, No. 1,213,626, granted to me January 23rd, 1917, for a paper feeding machine.

Reference is to be had to the accompanying drawings forming a part of this specification in which similar reference characters indicate corresponding parts in all the views.

Figure 1 is a partly sectional side elevation of a paper feeding machine having my invention applied thereto;

Fig. 2 is a detail in vertical section on an enlarged scale, the section being taken approximately on the line 2-2, Fig. 3;

Fig. 3 is a partly sectional front elevation of the'features shown in Fig. 2.

Referring to the automatic paper feeding machine illustrated, and, adopting the general descriptive language of the patent, the letter A designates the frame of the machine, and B is an elevating platform having guide rods B mounted in suitable guides A projecting from the frame. The elevator B is provided with racks B extending downwardly from the underside thereof and are engaged by pinions (J fixed on the shaft C mounted in bearings on the frame, one end of the shaft 0 having fixed thereto a ratchet wheel C engaged by a pawl C carried by a lever D which has one end pivotally mounted on the frame, as at D, and the other end of said lever D is pivotally fastened to an eccentric strap D of an eccentric D mounted on a shaft D of a bag machine or printing press (not shown), thereby obtaining power for operating the elevator.

E designates a stack of paper, paper bags, Or cards placed upon the elevator B to be fed upward through the medium of the pawl C ratchet C pinions C and racks B to the selecting mechanism, comprising a frame F adjustably secured as at F to the frame A. Said frame carries a horizontally disposed shaft F having a crank F at one end to which is pivotally connected one end of a rod G, the opposite end of which carries an antifriction roller G adapted to contact with a cam G mounted on a shaft G of a bag machine' Said roller is held in engagement with the cam by means of a spring G interposed between a fixed arm H and an adjustable washer H on the rod G. The object of the cam G and rod G is to impart a back and forth movement to the pusher arms I, and adjustable puller arms K secured on the shaft F Said puller plates may be adjusted to and from each other to accommodate articles of different widths.

It will be seen upon reference to the drawing that links K are adjustably connected to the lower ends of the arms K and have pivoted to their free ends the pusher plates K provided on their under faces with shoulders K adapted to engage the rear edge of the uppermost sheet or card of the stack E, said sheet having been fed forward one step by the pusher arms I.

In the initial step, the pusher arms I push the topmost sheet forward far enough for the shoulders K of the pusher plates 2-, when in their farthest backward position, to engage the rear edge of said sheet and on its forward stroke will feed said sheet for ward to the position shown at X in Fig. 1, where the sheet comes in. contact with a stop L, the sheet being then in position to be gripped and taken away by the machine to which it is being fed.

In order that the stack may always be maintained at the proper height for feeding, I have loosely mounted on the rear of the frame A a shaft 0 to which is secured an arm 0 carrying a roller 0 adapted to rest upon the stack E. The outer end of the shaft O carries a slotted arm 0 to which is connected the upper end of a rod P which is mounted in suitable guides and whose lower end has a lug P which, as the roller 0 lowers, releases and permits the pawl C to fall into engagement with the ratchet the pawl being moved up and down by the continuously revolving eccentric D It will thus be seen. that the elevator will be raised to the proper height or until the roller automatically raises and throws the pawl C out of engagement with the ratchet C by means of the lug P.

My present invention resides in rollers M, N, mounted on constantly rotating shafts M, N, between which the paper passes to advance from the feed means to the stop L or its equivalent. The roller shafts turn as indicated by the arrows in Figs. 1 and 2 so that the lower side ofthe upper roller turns forwardly toward the stop L to advance the sheet or tube while the lower roller N constitutes a stop roller and has its top thereof rotating rearwardly, that is to say, toward the stack E. The shafts M, N turn in bearings m, n, which are vertically adjustable by reason of a screw m and a wedge 01/ whereby to regulate the distance between the rollers M, and N and permit a single sheet or tube to pass tlierethrough. If a second sheet advances to the rollers, then the second sheet will be arrested by contact with the roller N and held back by reason of the rearward turning of said roller. The rollers M, N hare their collars or hubs m 7?, adjustablysecured to the shafts m, n, by set screws m, n, therebeing in practice a pair of separate rollers on each shaft so that the rollers on the respective shafts can be adjusted axially thereof to suit different widths of material in addition to the ad justment of the shafts relatively to each other to regulate the space between the same.

The described arrangement of the constantly revolving rollers N N therefore, and their adjusting means serve to insure the feeding of a single tube, sheet or like article, and the holding back of any additional article without employing complicated mechanism or devices requiring con--- stant adjustment or liable to get out of order.

I wish to state in conclusion that although.

the illustrated exampleconstitutes'a practical embodiment of my; invention, 1 do not limit myself strictly" to' the mechanical de tails herein illustrated, since manifestly the same can be considerably varied without departure from the spirit of the invention as defined in the appended claim. 1

Having thus described my invention, I claim as new, and desire'to secure by Letters Patent:

In a machine of'the class described, means to permit feeding of a single article and prevent more than a single article being fed, said means comprisingconstantly r0 tating shafts, a pair of rollers on each shaft ALVIN P; GREENE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

